Question

Thirty children were asked about the number of hours they watched T.V. programmers in the previous week. The results were found as follows:

1	6	2	3	5	12	5	8	4	8
10	3	4	12	2	8	15	1	17	6
3	2	8	5	9	6	8	7	14	12

(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 – 10.
(ii)How many children watched television for 15 or more hours a week?

Answer 1

(i) Class intervals will be 0-5,5-10,10-15,............
The grouped frequency distribution table is as follows

Hours	Number of children
0-5	10
5-10	13
10-15	5
15-20	2
Total	30

(ii) The number of children, who watched TV for 15 or more hours a week is 2 (i.e.,number of children in class interval 15-20 ).